CD34 and myelodysplastic syndrome: Specifically, we examined the mis-splicing event in 124 patients with MDS with ring sideroblasts and a VAF ≥ 20% (SF3B1mt, n = 83; SRSF2mt, n = 15; U2AF1mt, n = 4; and splicing factorWT, n = 22) compared to healthy donors (n = 16) using full-length total RNA sequencing data from CD34+ BM MNCs.